Sequential adds MPE support for Prophet-6 and OB-6

Sequential has released a new OS for the Prophet-6 and the OB-6 that adds MPE support as well as Prophet-5 Rev4-style "vintage" mode operation — as well as some new and greatly enhanced aftertouch curves. All of this makes both synths significantly more expressive.

Changes:

• Support for MPE (MIDI Polyphonic Expression). This enables the Prophet-6 and OB-6 to respond to MPE-driven controllers such as the LinnStrument, Expressive E Osmose, Roli Seaboard series, and others.
• Prophet-5 Rev 4-style "vintage" mode. This gives the Prophet-6 and OB-6 a looser, more organic sound that emulates the behavior of vintage synthesizers where the behavior of individual oscillators, filters, and envelopes vary from voice to voice.
• Improved aftertouch curves for enhanced expressiveness when using the Prophet-6 and OB-6's own keyboard.